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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@user97234
The camera control service is UUID: 291D567A-6D75-11E6-8B77-86F30CA893D3
The commands to the camera are sent on characteristic UUID: 5DD3465F-1AEE-4299-8493-D2ECA2F8E1BB
And we request notifications on characteristic UUID: B864E140-76A0-416A-BF30-5876504537D9
If you connect a phone to the camera with the nRF app then sending anything to the command characteristic UUID then it immediately invokes the PIN display on the camera screen.